Steve,
Did 616Fubar send you a special email package? LOL!
Save all your data to CD and reformat, reinstall Windows, go thru all the Windows updates from the Microsoft site, then your applications. Be sure to install Norton or McAfee anti virus right behind Windows. Run a virus/trojan scan on your data CD before you copy the files over to your hard drive. Also get a copy of AdAware or Spybot.
Once infected, this is the best way to fix it. All the others are half measures to keep you running, but you always end up with weird problems if you don't start off fresh.